Video - Docker In Docker for Casa OS Code Server

Thank you very much for your work! I really liked the video about Casa OS and Code Server deployment. I would like to make a full blown dev environment based on this solution. But the missing part is docker in docker. I would like to have the following chain: host server → host OS → casa OS → code server (sits already in docker) → VScode devcontainer (basically docker sitting inside code server docker). Found some useful links, but was not able to configure it till that moment.
Ideally to be able to use this extension Dev Containers - Visual Studio Marketplace and devcontainer.json files to open projects inside dev containers sitting inside code server container.

Thank you very much!